Taladriz-Blanco Patricia, Spuch-Calvar Miguel, Del Prado Anselmo, Weder Christoph, Rother-Rutishauser Barbara, Petri-Fink Alke, Rodriguez-Lorenzo Laura
Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 Fribourg CH-1700 Switzerland
International Iberian Nanotechnology Laboratory (INL), Water Quality group Av. Mestre José Veiga s/n 4715-330 Braga Portugal
Nanoscale Adv. 2021 Dec 1;4(2):387-392. doi: 10.1039/d1na00711d. eCollection 2022 Jan 18.
Control over the synthesis of anisotropic nanoparticles is crucial as slight differences in their size, shape, sharpness, or the number of tips in the case of gold nanostars, has an inordinate influence on their properties and functionality for future applications. Herein, we show that the supplier and purity of polyvinylpyrrolidone (PVP) can significantly alter the synthesis of gold nanostars, demonstrating that impurities, not PVP itself, are the main factor responsible for star-like shape formation. We demonstrate that in the presence of pure PVP and ,-dimethylformamide, the use of hydrazine leads to the formation of branched nanoparticles. This synthetic approach opens the door to solving issues associated with the use of commercial PVP during the synthesis of gold nanostars.
控制各向异性纳米颗粒的合成至关重要，因为它们在尺寸、形状、尖锐度方面的细微差异，或者在金纳米星的情况下尖端数量的细微差异，都会对其未来应用的性质和功能产生极大影响。在此，我们表明聚乙烯吡咯烷酮（PVP）的供应商和纯度会显著改变金纳米星的合成，这表明杂质而非PVP本身是导致星状形状形成的主要因素。我们证明，在存在纯PVP和N，N - 二甲基甲酰胺的情况下，使用肼会导致形成分支状纳米颗粒。这种合成方法为解决金纳米星合成过程中与使用商业PVP相关的问题打开了大门。
